取得控制台输入，并从最高到最低排序

Question

As the title say, I want to take inputs from the user via the console and use a list or array to sort them, then output the list.

Basically, the list is to have three variables, one string and two integers

(example: infexis, 20, 19 john, 24, 3 jane, 17, 28

and the list should be output in the same format, though just sorted based on the first number, so john would be first, then infexis, then jane. the name and second number doesnt matter in the sorting.)

I'm really new to c#, and I'm wondering how to take user input and add it to a list with no specified amount of variables, (so the list can take 2 entries, or 12, not just a specified number.) Any help would be appreciated!

Answer 1

I highly suggest you introduction of class instead of string array in which you'll store user's input.

Example:

public class Person 
{
  public string Name { get; set; }
  public int FirstNumber { get; set; }
  public int SecondNumber { get; set; }
}

public static void Main()
{
  //list of persons
  List<Person> people = new List<Person>();

  //Your piece of business logic ...

  //Creating person object

  var person = new Person();
  person.Name = Console.ReadLine();
  person.FirstNumber = Console.ReadLine();
  person.SecondNumber = Console.ReadLine();
  people.Add(person);

  //order by FirstNumber (needed to add: System.Linq namespace)
  var orderedPeople = people.OrderBy(p => p.FirstNumber);

  //output
  foreach(var p in orderedPeople)
  {
    Console.WriteLine(String.Format("{0} {1} {2}", p.Name, p.FirstNumber, p.SecondNumber));
  }
}

Note: I didn't test this code, so you can expect some compile time bugs, but you can get broader way how to handle your problem easier.

Also, you can expand your class to meet additional requirement, like some other (optional) properties (ie user inputs)

Answer 2

I'd create a class which holds the type of information you describe.

class Person
{
    public string Name { get; set; }
    public List<int> Numbers { get; set; }
}

Then you're able to sort by the first element of Numbers .

    static void Main(string[] args)
    {
        var people = new List<Person>()
        {
            new Person
            {
                Name = "Jeff",
                Numbers = new List<int>{ 1,2,3}
            },
            new Person
            {
                Name = "Sam",
                Numbers = new List<int> { 7 }
            }
        };

        foreach (var person in people.OrderByDescending(x => x.Numbers[0]))
        {
            Console.WriteLine(person.Name);
        }
    }

Output: Sam Jeff